<template>

	<view class="cart-container" v-if="cart.length>0">
		<!-- 收获地址 -->
		<my-address></my-address>

		<!-- 购物车标题区域 -->
		<!-- 购物车商品列表的标题区域 -->
		<view class="cart-title">
			<!-- 左侧的图标 -->
			<uni-icons type="shop" size="18"></uni-icons>
			<!-- 描述文本 -->
			<text class="cart-title-text">购物车</text>
		</view>

		<!-- 购物车列表 -->
		<my-goods v-for="(item, i) in cart" :key="i" :goods="item" :showRadio="true" :showNum="true" :showDel="true"
			@del-goods="delGoodsHandler" @radio-change="radioChangeHandler" @num-change="numChangeHandler"></my-goods>

		<!-- 结算栏 -->
		<my-settle></my-settle>

	</view>

	<!-- 空白购物车区域 -->
	<view class="empty-cart" v-else>
		<image src="/static/cart_empty@2x.png" class="empty-img"></image>
		<text class="tip-text">空空如也~</text>
	</view>

</template>

<script>
	// 导入vuex辅助方法
	import {
		mapGetters,
		mapState,
		mapMutations
	} from 'vuex'

	export default {
		data() {
			return {};
		},
		computed: {
			...mapGetters('m_cart', ['total']),
			...mapState('m_cart', ['cart'])
		},
		onLoad() {
			// 初始化tabBar徽标值
			this.setBadge()
		},
		updated() {
			// 数据改变后，重新设置tabBar徽标
			this.setBadge()
		},
		methods: {
			...mapMutations('m_cart', ['updateGoodsState', 'updateGoodsCount', 'removeGoodsById']),
			setBadge() {
				// 设置tabBar页面的徽标值
				uni.setTabBarBadge({
					index: 2,
					text: this.total + ''
				})
			},
			// 购物车商品选中/未选中事件处理函数
			radioChangeHandler(e) {
				console.log('radio-change', e)
				this.updateGoodsState(e)
			},
			// 购物车数量变化事件处理函数
			numChangeHandler(e) {
				console.log('num-change', e)
				this.updateGoodsCount(e)
			},
			// 从购物车删除商品
			delGoodsHandler(e) {
				console.log('del-goods', e)
				// 从vuex中删除数据
				this.removeGoodsById(e)
			},
		}
	}
</script>

<style lang="scss">
	page {
		height: 100%;

		.cart-container {
			background-color: white;
			// height: 100%;
			// box-sizing: border-box;
			padding-bottom: 50px;

			.cart-title {
				height: 80rpx;
				display: flex;
				align-items: center;
				padding-left: 12rpx;
				border-bottom: 1px solid #efefef;

				.cart-title-text {
					margin-left: 20rpx;
				}
			}
		}

		.empty-cart {
			display: flex;
			height: 100%;
			flex-direction: column;
			justify-content: center;
			align-items: center;
			// padding-top: 150px;

			.empty-img {
				width: 90px;
				height: 90px;
			}

			.tip-text {
				font-size: 12px;
				color: gray;
				margin-top: 15px;
			}
		}

	}
</style>
